A novel 4π Gd-loaded liquid scintillator detection system

With a Geant4 software package based on the Monte Carlo method, a multi-cell 4π detection system is designed, which consists of 40 Gadolinium-loaded liquid scintillation detectors. These detectors, associated with a fission chamber in its geometrical center, constitute a platform. This platform is mainly used for the measurement of a fissionable nucleus(n, 2n) reaction cross section. In order to properly determine the experimental set-up, we carry out a systematic numerical simulation using our model which is established by the Geant4 software package. This work provides rich and valuable reference data for experiments on the fissionable nucleus(n, 2n) cross section measurement in the future.     

泡沫镁制备技术研究现状及其在航空航天领域的应用前景

泡沫镁作为一种新型功能材料,近年来逐渐受到了国内外的广泛关注,但由于镁过于活泼,易引起爆炸,难以在生产中被大量使用,故关于泡沫镁的研究较少。主要综述了泡沫镁阻尼性能、吸声性能、吸能性能、散热性能、生物医学性能和电磁屏蔽性能等几种主要的性能特点,进而综述了粉末冶金法、熔体发泡法、渗流铸造法等几种常见的泡沫镁材料制备工艺的研究进展,并结合笔者的研究理解对几种制备工艺进行了对比,分析了各种制备方法的优缺点。在此基础上对泡沫镁材料在航空航天领域上的应用进行了分析,表明了其在航空航天领域有着广阔的应用前景。     

深冷处理对C17510铍铜合金组织及性能的影响

为改善C17510合金组织,提高合金性能,采用固溶、时效、深冷处理工艺对C17510合金进行了处理,利用维氏硬度计、XRD、电导率测试仪、金相显微镜等手段研究了C17510合金深冷处理前后显微组织及性能的变化.结果 表明,在保持固溶及时效处理条件不变的情况下,经深冷处理后C17510合金组织中出现孪晶;深冷处理对C17...